[GreenKeys] Rixon relay

[John, W9DDD]

As pointed out by Tom, the Rixon has 3 large pins and the 255 has 2 of 
each large and small.

The other difference you can note from the connection diagram is pin 8 
is labeled "return" where the 255 has no connection to pin 8. Was that 
intended to be an earth ground to minimize RF noise from the device? It 
would appear that modifications were required to use this beast.

Doesn't exactly look like a case of parts reduction to minimize cost 
does it.

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The above comments or recommendations are SWAG. Use at your own risk.
John, W9DDD

On 7/10/2021 8:14 AM, Jim Haynes wrote:
> When I worked at Teletype in the summer of 1958 one of the little projects
> I was handed was a solid state replacement for the polar relay.  My boss
> and I both came up with the idea of a low-voltage selector magnet and
> solid state driver as was later done in models 32, 33 and 35 and later.
> 
> I remember we had some company's sample of a solid state polar relay in
> a 255A can, but I don't remember the name of the company.  I remember it
> had two transistors in series to handle the 120V loop.
> 
> I had a somewhat larger concept of using low voltage inside a complete
> set, keeping the high voltage loop outside.  This I failed to sell, so
> the internal wiring of sets remained complicated by having loops that
> had to be kept closed.
> 
> And we were concentrating on the problem of driving the selector magnet, 
> when the more difficult problem was on the line side of the relay, where 
> it had to accomodate neutral or polar or some of the other zoo of 
> circuits that were in use for TTY transmission in those days.
> 
> Jim W6JVE
> 
>      ---
> 
>      "Ya can argue all ya wanna, but it's dif'rent than it was."
>      "No it ain't! No it ain't!  But ya gotta know the territory."
>          Meredith Willson, The Music Man
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